THRA.9 Flashcards

1
Q

Articulatio humeri is composed of which boney structures?

A
  • Cavitas glenoidalis (Scapula)
  • Caput humeri (Humerus)
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2
Q

Cavitas glenoidalis is deepened and surrounded by which structure?

A

Labrum glenoidale

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3
Q

What kind of joint is articulatio humeri?

A

Spheroidal

Although limited to hinge motion

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4
Q

Which strucrures act as a medial and lateral collateral ligament in the articulatio humeri?

A
  • Medial: The tendon of m. subscapularis
  • Lateral: The tendon of m. infraspinatus
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5
Q

How many recesses are present in articulatio humeri?

A
  • Eq/Ru: 3 cranial, 2 caudolateral
  • Ca/Su: 2 cranial, 1 caudolateral
  • Cranial: Recessi bicipitalis
  • Caudolateral: Recessus caudalis
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6
Q

Which structures strengthen the capsula articularis of articulatio humeri?

A
  • Lig. glenohumerale medialis
  • Lig. glenohumerale lateralis
  • Lig. coracohumerale (Eq/Ru/Su)
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7
Q

Which structure holds the tendon of origin of m. biceps brachii in place?

A
  • Lig. transversum humeri* (ØEq)
  • (Retinaculum transversum)*
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8
Q

Vagina synovialis intertubercularis is formed by…

In which species?

A

Part of the joint capsule surrounding the bicipital tendon in the intertubercular groove

Ca/Su

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9
Q

The equivilant of vagina synovialis intertubercularis in Eq/Ru is the…

A

Bursa subtendinea bicipitalis

(Doesn’t communicate with shoulder joint capsule)

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10
Q

Arterial blood supply to the shoulder is by which arteries?

A
  • A. axillaris
  • A. cervicalis superficialis
  • A. subscapularis
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11
Q

Which nerves innervate the shoulder?

A
  • N. axillaris
  • N. suprascapularis
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12
Q

Name the bursa between the skin and tuber spina scapulae in equine

A

Bursa subcutanea prescapularis

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13
Q

Name the bursa found between the tendon of insertion of m. infraspinatus and pars caudalis of the tuberculum majus humeri

A

Bursa subtendinea m. infraspinati

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14
Q

Name the bursa found under the tendon of insertion of m. subscapularis, passing over the shoulder joint

A

Bursa subtendinea m. subscapularis

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15
Q

List the stabilisers of the shoulder joint

A
  • M. articularis humeri (ØCa and Ru)
  • M. infraspinatus
  • M. subscapularis
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16
Q

List the extensors of the shoulder joint

A
  • M. supraspinatus
  • M. brachiocephalicus
  • M. biceps brachii
  • M. coracobrachialis
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17
Q

List the flexors of the shoulder joint

A
  • M. deltoideus
  • M. teres major
  • M. teres minor
  • M. triceps brachii capus longum
  • M. latissimus dorsi
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18
Q
A

M. Deltoideus Pars Scapularis

Origin: Caudal spina scapulae

Insertion: Tuberositas deltoidea of Humerus

Action: Flex Shoulder

Innervation: N. axillaris

Blood supply: A. cervicalis superficialis, a. subscapularis, a. circumflexa humeri caudalis

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19
Q
A

M. Deltoideus Pars Acromialis

Origin: Acromion

Insertion: Tuberositas deltoidea of Humerus

Action: Flex Shoulder

Innervation: N. axillaris

Blood supply: A. cervicalis superficialis, a. subscapularis, a. circumflexa humeri caudalis

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20
Q
A

M. Infraspinatus

Origin: Fossa infraspinata, spina scapulae, margo caudalis scapulae

Insertion: Facies m. infraspinati of Humerus

Action: Flex Shoulder Joint, Acts as a collateral ligament

Innervation: N. suprascapularis

Blood supply: A. cervicalis superficialis, a. circumflexa scapulae, a. circumflexa humeri caudalis

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21
Q
A

M. Teres Major

Origin: Margo caudalis scapulae, angulus caudalis scapulae

Insertion: Tuberositas teres major of humerus

Action: Flex Shoulder

Innervation: N. axillaris

Blood supply: A. thoracodorsalis, a. subscapularis

22
Q
A

M. triceps brachii caput laterale

Origin: Linea m. tricipitis

Insertion: Tuber Olecrani

Action: Extend Elbow, Flex shoulder

Innervation: N. radialis

Blood supply:

  • A. circumflexa humeri caudalis
  • A. profunda brachii
  • A. ulnaris caudalis
  • A. brachialis
  • A. axillaris
23
Q
A

M. supraspinatus

Origin: Fossa supraspinata, spina scapulae, margo cranialis scapulae

Insertion: Tuberculum majus of humerus

Action: Extend and stabilse shoulder

Innervation: N. suprascapularis

Blood supply: A. cervicalis superficialis, a. suprascapularis

24
Q
A

M. Subscapularis

Origin: Fossa subscapularis

Insertion: Tuberculum minus of Humerus

Action: Extend Shoulder, acts as medial collateral ligament for shoulder

Innervation: N. subscapularis

Blood supply: A. subscapularis, a. circumflexa scapulae

25
Q
A

M. Biceps Brachii

Origin: Tuberculum supraglenoidale, via sulcus intertubercularis of humerus

Insertion: Tuberositas radii, tuberositas ulnae

Action: Extend shoulder joint, flex elbow joint

Innervation: N. musculocutaneus

Blood supply:

  • A. circumflexa humeri cranialis
  • A. cervicalis superficialis
  • A. bicipitalis
  • A. axillaris
26
Q
A

M. coracobrachialis

Origin: Coracoid process of tuberculum supraglenoidale

Insertion: Crista tuberculi minoris of humerus

Action: Extend Shoulder Joint, adduct forelimb

Innervation: N. musculocutaneus

Blood supply: A. circumflexa humeri caudalis

27
Q
A

M. teres minor

Origin: Margo caudalis scapulae, tuberculum infraglenoidale (Ca only)

Insertion: Tuberositas teres minor of humerus

Action: Flex Shoulder

Innervation: N. axillaris

Blood supply: A. subscapularis

28
Q
A

M. triceps brachii caput longum

Origin: Margo caudalis scapulae

Insertion: Tuber olecrani

Action: Flex Shoulder, Extend Elbow

Innervation: N. radialis

Blood supply:

  • A. profunda brachii
  • A. axillaris
  • A. circumflexa humeri caudalis
  • A. brachialis
  • A. ulnaris collateralis
29
Q
A

M. Deltoideus Pars Acromialis

Origin: Acromion

Insertion: Tuberositas deltoidea of Humerus

Action: Flex Shoulder

Innervation: N. axillaris

Blood supply: A. cervicalis superficialis, a. subscapularis, a. circumflexa humeri caudalis

30
Q
A

M. Deltoideus Pars Scapularis

Origin: Caudal spina scapulae

Insertion: Tuberositas deltoidea of Humerus

Action: Flex Shoulder

Innervation: N. axillaris

Blood supply: A. cervicalis superficialis, a. subscapularis, a. circumflexa humeri caudalis

31
Q
A

M. latissimus dorsi

Origin: Thoracolumbar fascia Th7-Th8

Insertion: Tuberositas teres major

Action: Draws Limb Caudally, Flex Shoulder

Innervation: N. suprascapularis

Blood supply: A. cervicalis superficialis

32
Q

11

A

M. articularis humeri (ØRu, Ca)

Origin: Distal flexor surface of scapula

Insertion: Proximal humerus, near joint capsule

Action: Tenses shoulder joint capsule

Innervation: N. surpascapularis

Blood supply: A. cervicalis superficialis

33
Q
A

M. brachiocephalicus

Origin: Distal humerus, crista humeri

Insertion: Head, neck

Action: Extend shoulder, tense neck

Innervation: N. accessorius ramus dorsalis

Blood supply: A. auricularis caudalis, a. cervicalis superficialis

34
Q

Which category of joint is art. cubiti?

A

Hinge/Ginglymus

35
Q

Art. cubiti is composed of which bony structures?

A
  • Condylus humeri
  • Trochlearis ulnae
  • Caput radialis
36
Q

Art. cubiti is composed of which further joints?

A
  • Art. humeroulnaris
  • Art. humeroradialis
  • Art. radioulnaris proximalis
37
Q
A

Lig. collaterale cubiti laterale

Lateral epicondyle of humerus ⇔ Radius

(Slender part of ligament attaches to ulnar ØEq)

38
Q
A

Lig. collaterale cubiti mediale

Medial epicondyle ⇔ Ulna + Radius

39
Q

13

A

Lig. olecrani (Car only)

Medial epicondyle ⇔ processus anconeus

40
Q

The art. radioulnaris proximalis is formed between which boney structures?

A
  • Circumferentia articularis proximalis radii
  • Incisura radialis ulnae
41
Q

Which structures support the art. radioulnaris proximalis?

A
  • Lig. anulare radii
  • Lig. interosseum antebrachii
  • Membrana interossea antebrachii
42
Q

Art. cubiti is innervated by…

A
  • N. medianus
  • N. ulnaris
43
Q

Art. cubiti’s blood supply

A
  • A. interossea communis
  • A. transversa cubiti
44
Q

In Fe, which structures pass through foramen supracondylare of the humerus?

A
  • A. brachialis
  • N. medianus
45
Q
A

M. tensor fasciae antebrachii

Origin: M. latissimus dorsi

Insertion: Tuber olecrani, antebrachial fascia

Action: Tense fascia, extend elbow

Innervation: N. radialis

Blood supply: A. axillaris, a. thoracodorsalis

46
Q
A

M. Anconeus

Origin: C**rista supracondylaris, fossa olecrani

Insertion: Tuber olecrani, processus anconeus

Action: Extend Elbow

Innervation: N. radialis

Blood supply: A. brachialis

47
Q
A

M. Brachialis

Origin: Collum humerii

Insertion: Tuberositas radii, tuberositas ulnae (via sulcus m. brachialis)

Action: Flex Elbow

Innervation: N. musculocutaneus

Blood supply:

  • A. circumflexa humeri cranialis
  • A. cervicalis
  • A. axillaris
  • A. brachialis
48
Q
A

M. triceps brachii caput laterale

Origin: Linea m. tricipitis

Insertion: Tuber Olecrani

Action: Extend Elbow

Innervation: N. radialis

Blood supply:

  • A. circumflexa humeri caudalis
  • A. profunda brachii
  • A. ulnaris caudalis
  • A. brachialis
  • A. axillaris
49
Q
A

M. triceps brachii caput mediale

Origin: Proximal, medial humerus

Insertion: Tuber Olecrani

Action: Extend Elbow

Innervation: N. radialis

Blood supply:

  • A. circumflexa humeri caudalis
  • A. profunda brachii
  • A. ulnaris caudalis
  • A. brachialis
  • A. axillaris
50
Q
A

M. triceps brachii caput accessorium (ØEq)

Origin: Collum humeri

Insertion: Tuber Olecrani

Action: Extend Elbow

Innervation: N. radialis

Blood supply:

  • A. circumflexa humeri caudalis
  • A. profunda brachii
  • A. ulnaris caudalis
  • A. brachialis
  • A. axillaris
51
Q
A

M. triceps brachii caput laterale

Origin: Linea m. tricipitis

Insertion: Tuber Olecrani

Action: Extend Elbow

Innervation: N. radialis

Blood supply:

  • A. circumflexa humeri caudalis
  • A. profunda brachii
  • A. ulnaris caudalis
  • A. brachialis
  • A. axillaris